Hassey problem – Please help

[cliveh]

I wanted to use my 120mm Macro Planar which I have fitted to my 500C on many occasions. However, I took it off the other day and now it won’t fit back on. My 80mm fits ok as do macro rings, all in cocked position, as is the camera. I have compared the orientation of the tiny slit and dot, which is the same on the 120mm as on the others that fit. I am also able to fire the lens with the pin and re-cock it with a coin. However, it will turn in the camera ring but not click in.
Suggestions much appreciated, as I have consulted the manual and internet.

 

[raoul]

Tried fitting the lens on a macro ring?

 

[cliveh]

Can't do that either, both ring and lens in cocked position.

 

[Jesper]

Putting a small piece of soft tape across the slot and try to fit the lens shold give you a dent in the tape showing you if it is aligned correctly or (if the dent is not above the slot) where it hits.
If there is no dent at all the problem may be elsewhere in the mount.

Just a thought.

 

[cliveh]

Thanks for the suggestion, as I put a small bit of electrical tape on the slot and tried to fit it to an extension tube. It appears to be making an indent in exactly the right place (at the start of the slot), but when tape removed it will turn in the extention tube, but not click into place.

 

[johnielvis]

does it go all the way to alligned position?

if so, there may be something preventing the lock from clicking in...check the rest of the bayonet or the inside of the camera bayonet for junk---if other lenses go in and fire there should be no problem---can you fire it with the lens mounted but not locked?...that is--in the right position and functioning but just not locking? thinking there's some kind of slop or junk in the way problem there...I'd have to see it...if I had it in my hands I'd get it to lock--been fiddling with these thing for years...sometimes stuff happens that 's confusing...then you figure out what YOU did wrong ...

 

[cliveh]

John, thanks for reply and no I don’t think it goes all the way to the aligned position, as I checked it on a tube and can’t check it on the camera at the moment. Perhaps it will sort itself out over time and me fiddling with it.

 

[Leigh B]

Sounds like junk of some sort under the mating bayonet on the lens. Go in there with a toothpick and clean it out.

Not an uncommon problem.

- Leigh

 

[cliveh]

Hassey problem

Hassey problem still not solved. Any other suggestions?

 

[Groundloop]

The only thing I can think of is that one of the bayonet claws on the lens is bent or in some other way damaged. Your other 80mm and macro rings fit on the camera, but the Makro doesn't mount fully to either the camera or your macro rings, so to me, all signs point to an issue with the lens.

 

[cliveh]

Hassey problem

It is definately the lens, as other units fit. When I try to attach the lens it nearly gets there, as the silver lug goes in, but the lens wont reach the end of its travel to make it click.

 

[John Koehrer]

If you look at the mount in relation to the area behind it are all of the ears parallel to the surface?

 

[jmartin]

I have no idea for sure, but perhaps the information on the page linked below might be applicable? It has to do with the slotted keyway getting turned in the wrong (counterclockwise) direction, thus appearing to be correct but causing problems with the release pin. I've not had the issue with any of my 'blad lenses so I can't speak from experience...
http://photo.net/medium-format-photography-forum/006LFm

 

[cliveh]

Problem still not solved, perhaps I should put it in for repair?

 

[johnielvis]

TRY THIS

take off the tubes...re-cock them...then put the coin in the slot and turn it past the locking position--if you have tubes stacked, the added slop can prevent the lens from engaging....so give it "a bit more" of a turn...then put your lens on..CLICK (hopefully)...then you can mount the tubes/lens arrangement on the camera--this shouldn't happen, but i've had similar issues with old bellows...have to "over cock" to get it in...and I have an older auto bellows that has a teeny bit of slop..I have to clock the camera to the next frame and then PUSH on the lever just a tiny bit over the locking position for the lens to "click" cocked position.....

I think this is what's happening..nothing to worry about.

 

[cliveh]

Problem still there. When I try to mount the lens on a tube silver lug on the outer part of the tube goes in, but just wont allow the final bit of turn for it to click in and the lug to spring out.

 

[jeffreyg]

On the couple of occasions I had Hasselblad problems, I called Hasselblad in New Jersey and was able to speak with a technician. They were helpful and on one of calls the technician had a similar problem. I had to send it for repair which consisted of replacing a part that had since been upgraded. I imagine if you do send in a repair the lens should be sent as well as the body.

http://www.jeffreyglasser.com/

 

[johnielvis]

man....yeah--I guess it's the lens---is this the type with the screwed in bayonet? maybe that is loose then? the 120 though I don't think has the "cb" style bayonet....if its lining up properly but won't let the thing click in, the lens clicks in the camera ok...that means the tube lock ratchet clicker thing must be bent maybe? that's a possiblity too--did you try it with a different tube?...if it goes in the body, then it can't be the lens---it has to be a tube that's slightly out of spec so it lets one lens in but not the other...for sure if it works with the camera, then there's nothing wrong with the lens I'm thinking--it MUST be the tube---them tube ratchet things aren't the most beefy pieces of metal---it could be slightly bent maybe...or the tube can be loose too--there's screws around some tubes that can get loose. I'd really have to see it and handle it/ compare it to my stuff...further speculation is probably useless---yes...have someone look at it I guess....determine the cause.

 

[cliveh]

Definitely the lens, as it behaves the same (wont quite click in) on three different tubes and camera. All tubes will click in on camera and each other. However, I can see nothing visibly amiss with the back part of the lens, plate screws, and grooves cleaned with toothpick.

 

[Sirius Glass]

It may be CLA time for the lens.

 

[Leigh B]

Definitely the lens, as it behaves the same (wont quite click in) on three different tubes and camera.

The lens needs to be serviced.

Not sure how we're supposed to do that over the internet. :confused:


- Leigh

 

[johnielvis]

I hate to recommend something like this, but this is what I'd do--this is probably not an optical problem--it's the bayonet if anythihg---maybe the lens got a ding on the corner of the bayonet that is keeping the locking sprag from clicking in...if that is the case, then I'd have a look and see....next to another perfectly functioning lens....if it looks the teeniest bit deformed...I WOULD take the dreaded file and slowly start working on the corner to give it a friendlier edge for the lock to click in---to get going...I mean--that 's what they'd do at a repair shop i'm thinking...unless they want to sell you a while 1/2 of a lens/bayonet assembly.

seems to me that there's nothing to lose if they would want to replace it anyways or would use a file themselves....

 

[cliveh]

Thanks John, I will take a look with a magnifyer and report back.

 

[johnielvis]

CALIPER!!!

I forgot--get a machinist caliper or micrometer--somethint to measure the bayonet size on a good lens or a good tube...check against your lens--if your lens is BIGGER--then the file is needed--hey--non-destructive testing.

 

[cliveh]

I think John is correct about it being a bayonet problem and have now worked out where the silver lug clicks in on the bayonet formation. I believe it is a little notch type configuration. I can see no ding of surface alignment problem and would also be very reluctant to take a file to such a beautiful Hassey lens. However, I do notice more silvering (removal of black paint on this notch). This maybe normal, but still can’t detect why it doesn’t click in. I guess as suggested it needs a service. But a very frustrating problem.